gistfile1.txt

<?php

$total = 10000;

$count = 0;

$start = (float) array_sum(explode(' ',microtime()));

for($i = 0; $i <= $total; $i++)
{
        $ip = rand(1,255).'.'.rand(0,255).'.'.rand(0,255).'.'.rand(0,255);
        $rip = explode('.', $ip);
        $rip = array_reverse($rip);
        $rip = implode('.', $rip);
        $rix = exec('ping '.$rip.'.iceland.rix.is -c 1 -s 1 -r -W 0');
        if ( ! empty($rix))
        {
                $count++;
        }
}

$end = (float) array_sum(explode(' ',microtime()));

echo "\nProcessed $total with $count as icelandic in ". sprintf("%.4f", ($end-$start))." seconds";

?>